| /* |
| * PCI driver for the Synopsys DesignWare DMA Controller |
| * |
| * Copyright (C) 2013 Intel Corporation |
| * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/pci.h> |
| #include <linux/device.h> |
| |
| #include "internal.h" |
| |
| static struct dw_dma_platform_data dw_pci_pdata = { |
| .is_private = 1, |
| .chan_allocation_order = CHAN_ALLOCATION_ASCENDING, |
| .chan_priority = CHAN_PRIORITY_ASCENDING, |
| }; |
| |
| static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid) |
| { |
| struct dw_dma_chip *chip; |
| struct dw_dma_platform_data *pdata = (void *)pid->driver_data; |
| int ret; |
| |
| ret = pcim_enable_device(pdev); |
| if (ret) |
| return ret; |
| |
| ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev)); |
| if (ret) { |
| dev_err(&pdev->dev, "I/O memory remapping failed\n"); |
| return ret; |
| } |
| |
| pci_set_master(pdev); |
| pci_try_set_mwi(pdev); |
| |
| ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
| if (ret) |
| return ret; |
| |
| ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
| if (ret) |
| return ret; |
| |
| chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); |
| if (!chip) |
| return -ENOMEM; |
| |
| chip->dev = &pdev->dev; |
| chip->regs = pcim_iomap_table(pdev)[0]; |
| chip->irq = pdev->irq; |
| |
| ret = dw_dma_probe(chip, pdata); |
| if (ret) |
| return ret; |
| |
| pci_set_drvdata(pdev, chip); |
| |
| return 0; |
| } |
| |
| static void dw_pci_remove(struct pci_dev *pdev) |
| { |
| struct dw_dma_chip *chip = pci_get_drvdata(pdev); |
| int ret; |
| |
| ret = dw_dma_remove(chip); |
| if (ret) |
| dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret); |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| |
| static int dw_pci_suspend_late(struct device *dev) |
| { |
| struct pci_dev *pci = to_pci_dev(dev); |
| struct dw_dma_chip *chip = pci_get_drvdata(pci); |
| |
| return dw_dma_suspend(chip); |
| }; |
| |
| static int dw_pci_resume_early(struct device *dev) |
| { |
| struct pci_dev *pci = to_pci_dev(dev); |
| struct dw_dma_chip *chip = pci_get_drvdata(pci); |
| |
| return dw_dma_resume(chip); |
| }; |
| |
| #endif /* CONFIG_PM_SLEEP */ |
| |
| static const struct dev_pm_ops dw_pci_dev_pm_ops = { |
| SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early) |
| }; |
| |
| static const struct pci_device_id dw_pci_id_table[] = { |
| /* Medfield */ |
| { PCI_VDEVICE(INTEL, 0x0827), (kernel_ulong_t)&dw_pci_pdata }, |
| { PCI_VDEVICE(INTEL, 0x0830), (kernel_ulong_t)&dw_pci_pdata }, |
| |
| /* BayTrail */ |
| { PCI_VDEVICE(INTEL, 0x0f06), (kernel_ulong_t)&dw_pci_pdata }, |
| { PCI_VDEVICE(INTEL, 0x0f40), (kernel_ulong_t)&dw_pci_pdata }, |
| |
| /* Haswell */ |
| { PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_pci_pdata }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(pci, dw_pci_id_table); |
| |
| static struct pci_driver dw_pci_driver = { |
| .name = "dw_dmac_pci", |
| .id_table = dw_pci_id_table, |
| .probe = dw_pci_probe, |
| .remove = dw_pci_remove, |
| .driver = { |
| .pm = &dw_pci_dev_pm_ops, |
| }, |
| }; |
| |
| module_pci_driver(dw_pci_driver); |
| |
| MODULE_LICENSE("GPL v2"); |
| MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver"); |
| MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); |